I'd like to be able to mirror the back screen on my (on order) IQ3100 on my cellphone.

We have a micro HDMI port on the IQ3 back, my phone had USB-C (as do many computers now, mac/PC/tablets) I'd simply like to view the screen on my cellphone, and have focus check plus double tap to 100% mirrored on that, same it is on the back.

I'd much rather have wired connection than Capture Pilot WiFi - bullet proof, and much easier.

A HDMI signal can not be picked up and converted to USB. So this solution is not technically possible.The WiFi option is the best for a iOS device.If you want the Liveview wired, then pick up and kind of HDMI screen used for video equipment.Like this:https://www.blackmagicdesign.com/produc ... ideoassist